10. To assess the accuracy of a kitchen scale a standard weight known to weigh 1 gram is weighed a total of n times and the mean, , of the weighings is computed. Suppose the scale readings are normally distributed with unknown mean, µ , and standard deviation = 0.01 g. How large should n be so that a 90% confidence interval for µ has a margin of error of ± 0.0001? a. 165 b. 27061 c. 38416

10. To assess the accuracy of a kitchen scale a standard weight known to weigh 1 gram is weighed a total of n times and the mean, , of the weighings is computed. Suppose the scale readings are normally distributed with unknown mean, µ , and standard deviation = 0.01 g. How large should n be so that a 90% confidence interval for µ has a margin of error of ± 0.0001?
a. 165
b. 27061
c. 38416

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